Oil well pump with diluent delivery means



0d. 2, 1956 J. A. LONG OIL WELL PUMP WITH DILUENT DELIVERY MEANS Filed July 27, 1953 Jo/m A. 1; any

INVENTOR.

United States Patent OIL WELL PUMP WITH DILUENT DELIVERY MEANS John A. Long, Ventura, Califi, assignor t0 Emsco Manufactoring Company, Los Angeles, Calif., a corporation of California Application .lnly 27, 1953, Serial No. 370,543

Claims. (Cl. 103-1) My invention relates to the art of pumping oil from wells and relates in particular to an oil well pump especially suited for pumping of viscous and tarry oils which flow so slowly as to make pumping thereof extremely difficult.

it is an object of the invention to provide an oil well pump having means for delivering a diluent into the oil in the Well at point near the pump inlet so that viscous oil may be thereby diluted and pump with greater facility.

it is an object of the invention to provide an oil Well pump having upper and lower pumping sections and means for delivering a diluent into the well through a diluent passage which extends in part through the intermediate portion of the pump housing between the upper and lower sections.

It is an object of the invention to provide an oil well pump having a relatively larger diameter upper piston pump and a relatively smaller diameter piston pump connected to the lower end thereof, the pistons of these pumps being tubular and being connected by a tube so as to move in unison, there being a diluent passage extending down through the upper piston to communicate with the space between the upper and lower pistons, with a diluent passage in the pump housing connecting this space between the upper and lower pistons with the interior of the well, through which the diluent may flow into the oil in the well which is to be diluted for purpose of facilitating pumping thereof,

in this preferred form of the invention the pump operating string is continuously loaded by oil pressure, the piston drop is maintained by oil pressure exerted downwazdly upon the upper end of the piston structure, and diluent is injected into the oil in the well, thereby prodscin a condition which is favorable to more effective pumping of viscous oil from Wells.

Further objects and advantages of the invention may appear in the following description wherein, for the purpose of disclosure, some relatively unimportant details of construction have been described, without the intent, however, of limiting the scope of the invention set forth in the appended claims.

Referring to the accompanying drawings which are for illustrative purposes only:

Fig. l is a schematic sectional view of a preferred embodiment of my invention;

Fig. 2 is a cross-section taken as indicated by the line 2-2 of Fig.

Fig. 3 is a cross-section taken as indicated by the line 33 of Fig. i.

As shown in Fig, l, the pump of this invention has upper and lower pump sections A and B and is adapted to be lowered into a well casing containing oil which is to be pumped to the surface. The upper pump section includes a barrel lltl having a connector 11 at its upper end whereby it may be connected to'the lower nd of production tube for carrying the pumped oil to the surface. it will be understood that the disclosure is schematic-in character in view of the fact that standard 'ice pump parts may be employed in the combination to be hereinafter described.

The pump barrels may be of any known type and the pistons which operate therein may be selected from the prior art.

The upper pump section A includes a pump plunger 12 which, in accordance with common practice, is tubular and has a longitudinal passage 12a. At the upper end of the plunger 12, and in threaded connection therewith, there is a spider 13 for connecting it to the lower end of an operating string which consists of a plurality of tubular sucker rods 14 and a tubular polish rod 15. The lowermost sucker rod 14 is connected by a sleeve 16 with the threaded bore 17 formed in the boss 18 of the spider l3.

A sleeve 19 is connected to the lower end of the plunger 12, this sleeve supporting a diametrally extending tube 2-9, at least one end of which is open to the exterior of the sleeve 19. A tube 21 connects the transverse .tube 20 with the threaded bore 17 of the spider 13, thereby connecting the interior of the tube 20 with the interior of the string of tubular sucker rods 14.

The upper pump section A includes a sleeve 22 which is connected to the lower end of the barrel l0, and a reducing sleeve 23 connects the lower end of the upper section A to the upper end of the lower pump section B. This lower pump section B includes a lower pump barrel 24 and a lower tubular plunger 25 operative in the barrel 24. The upper end of the lower plunger 25 is connected by a tube 27 with the lower end of the sleeve 1%, thereby connectin with plungers 12 and 25 so that there will be a continuous axial passage 28 therethrough consisting of the passage 12a of the plunger 12, the passages 1% and 27a of the parts 19 and 27, and the axial passage 25:: through the lower plunger 25, the upper end of which passage 23 communicates through the openings 2) of the spider 13 with the space 3% above the upper plunger 12, To control the flow of oil through the passage 23 a travelling valve 31 is provided, this travelling valve 31 being connected to the lower end of the plunger 25.

The housing of the lower pump section B is completed by a sleeve 32 and a standing valve 33 connected to the lower end of the barrel 24. The upper and lower pump sections A and B have their respective barrels connected by the coupling 23 so as to form a substantially continuous housing. The upper and lower plungers l2 and 25 are connected by the tube 27 so as to form a continuous plunger structure and are separated by a space 34 around the tube 27 and the sleeve 19. The sleeve 22 which forms a part of the upper pump section A has at least one opening 35 there-through to connect the space 34 with the space 36 within the well containing oil to be pumped.

In the operation of the pump diluents in the form of a light fluid capable of reducing the viscosity of the oil in the well, for example by intermi'xture therewith, is fed down through the operating string consisting of the polish rod 15, the tubular sucker rods 14, the sleeve 16 and the tubes 21 and 26 into the space 34 from which the fluid is intermittently discharged through the opening 35 into the oil in the well. The fluid follows a downward path within the casing 9'gen'erally'indicated by the arrows 40, intermixes with and dilutes the oil in the well and eventually passes in through the standing valve 33 into the pump structure. Since the space 34 is open to the exterior through the openings 35, and further since the diameter of the upper plunger 12 is bigger than the diameter of thelower plunger 25 there will be a continuous lOadingOf the plunger structure whereby the suckerrod string will be maintained continuously in tension and the plunger structure will "move downwardly as fast as permitted by the downward movement of the sucker rod string.

I claim:

1. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; and means for delivering fluid to said duct means.

2. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; and a tubular operating string connected to said upper plunger and to the upper end of said duct means for reciprocating said plunger and delivering fluid to said duct means.

3. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; a spider connected to said upper plunger, said spider having a passage connected to the upper end of said duct means; and means for connecting a fluid delivery tube to said passage of said spider whereby fluid may be delivered to said duct means and through said duct means and said opening to the exterior of the pumping device.

4. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; a spider connected to said upper plunger, said spider having a passage connected to the upper end of said duct means; and a tubular operating 4 string connected to said spider and having its passage connected to said passage of said spider whereby the plungers of the pumping device may be reciprocated and fluid may be delivered to said duct means and through said duct means and said opening to the exterior of the pumping device.

5. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough, said lower pump barrel being smaller in diameter than said upper pump barrel; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; and means for delivering fluid to said duct means.

6. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough, said lower pump barrel being smaller in diameter than said upper pump barrel; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecta ing said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; and a tubular operating string connected to said upper plunger and to the upper end of said duct means for reciprocating said plunger and delivering fluid to said duct means.

7. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough, said lower pump barrel being smaller in diameter than said upper pump barrel; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device, a travelling valve for controlling flow through said passages; a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; a spider connected to said upper plunger, said spider having a passage connected to the upper end of said duct means; and means for connecting a fluid delivery tube to said passage of said spider whereby fluid may be delivered to said duct means and through said duct means and said opening to the exterior of the pumping device.

8. In a pumping device of the character described: an upper pump barrel having an upper pump plunger therein with a longitudinal passage therethrough; a lower pump barrel having a lower pump plunger therein with a longitudinal passage therethrough, said lower pump barrel being smaller in diameter than said upper pump barrel; tubular means connecting said upper and lower plungers together, said tubular means having a passage connecting the passages of said plungers; means connecting said upper and lower barrels together and providing an opening connecting the interiors of said barrels with the exterior of said pumping device; a travelling valve for controlling flow through said passages; 'a standing valve connected to the lower end of said lower barrel; duct means in said upper plunger arranged to carry a fluid from the upper end of said upper plunger to said opening; a spider connected to said upper plunger, said spider having a passage connected to the upper end of said duct means; and a tubular operating string connected to said spider and having its passage connected to said passage of said spider whereby the plungers of the pumping device may be reciprocated and fluid may be delivered to said duct means and through said duct means and said opening to the exterior of the pumping device.

9. In a pumping device of the character described: a barrel structure having an opening intermediate its ends connecting the interior of the barrel structure with the exterior thereof; a plunger structure in said barrel structure, the upper portions of said plunger and barrel structures being respectively of larger diameter than the lower portions of said plunger and barrel structures, said plunger structure having duct means extending from the top thereof to an intermediate point in the side thereof to deliver a fluid to said opening of said barrel structure; and means arranged to deliver said fluid to the upper end of said duct means, whereby the fluid will pass through said duct means and said opening into the Well adjacent said pumping device.

10. In a pumping device of the character described: a barrel structure having an opening intermediate its ends connecting the interior of the barrel structure with the exterior thereof; a plunger structure in said barrel struc ture, said plunger structure having duct means extending from the top thereof to an intermediate point in the side thereof to deliver a fluid to said opening of said barrel structure; and means arranged to deliver said fluid to the upper end of said duct means, whereby the fluid will pass through said duct means and said opening into the well adjacent said pumping device.

References Cited in the file of this patent UNITED STATES PATENTS 1,272,737 Walker July 16, 1918 1,574,292 Kelley Feb. 23, 1926 1,716,709 Smith June 11, 1929 2,567,513 Haines Sept. 11, 1951 2,639,674 Reese May 26, 1953 

